Pneumatic sander



Aug. 2,1927. 1,637,609

` T. s. GILMORE PNEUMATIC SANDER Filed Dec. l5, 1926 i* ,Il A lllllmllllgli//Mm 'THOMAS s. en /vans,

/rl ven tal? Attorney UNITEDSTATES Patented Aug. 2, 1927.

f i i y 1,637.60?)

THOMAS s. ernmonn, crm GRANDE, OREGON.

i 's PNEUMATIC'SAZNVDER. y

i Applioatienlled December 19i2.A Serial No. A154,957. I

, invention relatesy to trac-tiony Sanders as a class.

"The object of my invention is to provide i* a device of this class, which :has an appara- 5 tus fory pneumatically loosening and starting 'the movement of the lowerportionof a contained sand column and thereaftery to ac-\ celeratethe discharge of such sand toward apre-determined location. y'Ifhedevice is o Iparticularly intended for locomotives and yns vehicles which travel upon and over fixed rails. but may-be adapted to other vehicles requiring traction aid. I attainthese'ob-y jects, aswell as'other advantages, bythe construction`l combination and arrangement of parts illustrated in the ,accompanying drawings whichform a part hereof. M y

Fig. I is a side sectional yview of the de-r vice asarranged forsandidischargein advance ofa traction wheel. n

Fig. II israview on themline IIf-II in yFie'. I partly in section.

a locomotive boiler with 4sand dome or reservoir and two traction wheels,'with the de,- vice indicated in connection therewith ,in operativepositions. y f ,y L

Like characters referto ylikepartsin the views.y t s `f A conveyor pipe 1y extendsl from a, sand supply reservoir, suchas 2 on aflocomotive,

f downwardly to a. convenientlocation, herein 1, which angle is substantially, inlalignment yshownat 3, the end of the pipe beine'thireaded. `My device is secured upon they lower end of this pipe as shown. .Its casinghas downwardly curved passage 4 from the pipe ltoy an outlet 5 arranged at a convenient-ly directed `inclined v angle.y From .the outlet 5'the upper, inner surface of the pipe isy inclined atan angle extending to the pipe with the center of the Voutlet and the surface of the sandwhile remaining repose across they outlet 5. The`v surface referred to is .inr`

dicated .at 5".` s The lower portion voi? the pas` sage thus lforms anl approximately horizontal trap 5", whichretains ther foot of a sand column in repose `therein and prevents the f flow of sand through the passageby gravit-y ytorce. A sump plug 6 is positioned in the lower portion of the trap 5a to aiiord access to it from below. From the outlet 5 a chamber 7 ext-ends at right angle, with a vert-ical, y

downwardly positioned outlet 8 at its opposite end which is inwardly threaded. Above ythe chamber there is a horizontal travellingupon a rail 17in the ,recess 9, threaded'at its opening A pipe 10 extends from a source of air supply'punder pressure toa connection with the recess 9 in' its' opening 9a. e A needle valve y11 .is

seated in the upper end 'of aldischarge pase,

sage or duct 12 extending from the frecess 9 at a convenient angle and in a direction toward the Central part of the outlet 5. Another needle valve 13 is seatedy in the upper end 'of a'discharge passage or duct 14 ex .tending vertically from the recessv9 intothe chamber 7 and in yalignment above and with' the central part of the outlet 8. A pipe 15 extends from a connection with the chamber youtlet 8 vto a pre-determined position of-disf charge at its free end. A similar arrange# to rthat-first. described. Common sand 16,is i

shown positioned int-he passage 4 and trap y 5*. In Fig. III the pipe 15 is shown' ex,- III is a side elevation ofy part ot` tendingy toa position for discharge upon a rail 17 in advance of ay locomotive driving like.V pipe of the opposing. system is shown extendingto a position for discharge in advance of a locomotive driving` wheel4 1,9

reverse direction to that vfirst mentioned." v The operation will now be described. s The valve 11, which'I` willcall a spreader valve, isset for av convenientv and desired quantity. of air discharge under pre-determined pressure, toward the opening 5. The valve 18, which I will call an accelerating valve, is also set for a convenient and desired quantityof air` dischargeunder-predetermined pressure, toward the opening 8.

lIt `will now be yseen that when air underk pressure is admitted into the recess 9 from kthe pipe 10, and by the spreader valveto the duct 12, the blast from the duct 12 breaks up and blows the sand in the trap through the' openingr 5 into thecham'benf, andthe gravity force of the sand column in the pipe 1 causes the trap to receive a supply continuously as long as the air is admitted. The blast from the duct 12 strikes the sand approximately near the center of the opening 5 and the inclined pipe surface 5b allows the sand to'flow freely along its upper por-k tion toward this point and theblast carries it over the curved lower surface of the outlet into the chamber 7. When the air is thus. blown into the chamber 7, it is pre- `common apparatus *applied to locomotives vented from lodging there or forming into a. whirling mass by downward pressure of air admitted by the accelerator valve 13 into the duct 14 and thence into the chamber 7, which forces the sand through the pipe 15 to the place of discharge. Upon shutting off the discharge of air through the Ypipe 1() the foot of the sandcolumn regains its posit-ion of repose as shown and the dis'- charge `of-sandceases,A Theoperat-ion ofthe opposngsystem in Lthe reverse direction of Vsand discharge isrsimilar to that just described, f

fIt .is wellzknown that heretofore, in the for the discharge of sand upon the rails to aid traction7 the sandoften becomes wetor hardened into lumps which clog ythe dischargecpipes or .trap and prevent the sand from flowing freely for the purpose indicated.y These ditliculties have not as yet been ycompletely overcome.v There can be no dispute as to theV necessity fory such an apparatus to functionwith regularity-and instant p romptnesarfor the-,reason that the operation of a locomotive, to which it may be attached, involves the safety of life and property.l My device herein shown has'been tested and proven to be efficient in overcomingfthe diiiiculties referred to. It is new and usefull, also, by reason of its simple construction, it can befmanufactured andv installed for use ata very moderate charge, npon vehicles for which it isadapted. Y

' I claim: n i 1 p 1. In' a sanding device, a casing having an intake," a curved passage extending therefromto an outlet directed at a convenient .upwardly inclined angle, the lower portion of said passage forming an approximately horizontal trap,ia chamber adjacent to said outlet, havingja downwardly facing discharge outlet, the upper', innery surface of said passage being'inclined at an angle from the intake substantially in alignment with the center ofthe outlet. Y

yf2. In'` a sanding device, the combination of; a casing having an intake, a curved pas-V sage extending therefrom to an outlet dirented at a convenient'upwardly inclined angle,7the lower portion of said passage formingan approximately horizontal trap, a chamber adjacent to said oulet, having a downwardly facing discharge outlet, an air recessr above the chamber, having a first ductJ extending therefrom into. and toward the'central part of said curved passage outlet at a pre-deterinined angle, a valve seatedr in the ripper end of said duct, a second duct extending'from said recess into said chamber for discharge therefrom toward the central part of the chamber outlet and a valve yseatedin the upper end of said second duct. 3. In a sanding device, the combination of; a casing having an intake, a curved pas- Vsage extending therefrom to an :outlet directedk at a convenient upwardly inclined angle,y the lower portion of said passage forming kan approximately horizontal trap, 'a chamber adjacent to said outlet/.having a downwardlyfacing discharge` outlet, an air recess above the chamber7 having a yfirst duct-extending therefrom into and toward the central part of said curved passage outlet at a predetermined angle, a valve seated in theupper end of said duct, a. second duct extending from said Yrecess into said chamber for 'discharge therefrom toward the cen` vtral part of the chamberoutlet, a valve seatedin the upper end of said second duct, a

pipe extending from a ,source of sandsupply to and into the said casing intake, and apipe extending `from said casing vdischarge outlet to a selected its Lopposite end. ,f f

4. Ina sanding device,ythe combination of; a casing havingan intake, a curved passage extending therefrom to an outlet diposition for discharge from i rected ata convenient upwardly inclined angle, the lower portion of saidlpassagefform- Ving an approximately horizontal trap, g'a chamber adjacent to said outlet, ,having a downwardly facing discharge'outlet, an v4air recess above the chamber, having a first. duct extending therefrom ,into and toward the central part of said curved passage outlet at a prei-determined angle, a valve Aseated in they upped endof said duct, a second duct extending from said lrecess into saidv cham- `ber for dischargel therefrom towardthe central part of the chamberv outlet, a valve seated inthe upper en'd ofsaidsecond duct` a' pipe .extending Afrom asource of sandsupply to and into the said casing intake,a pipe extending from said casing dischargervoutlet to a'selected position for discharge from its/opposite end, anda pipe extending from a sourcejof compressedv airsupply to and into said air recess.

THOMAS s. eiLMoRn." 

